ZeRok is a Starcraft 2 map I made using the Starcraft 2 map editor installed from the battle.net launcher from here. I learned the basics from a couple youtube videos on the editor but most of the learning I did was from experimentation and testing. The Starcraft 2 map editor is a great tool for expressing your creativity and making a world that you can enjoy and play in. Simply open Starcraft 2 and search for ZeRok as a custom melee map to play it.